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DIE GRINDING-MACHINE.

No. 326,001. Patented Sept. 8, 1 885 IHIH H Hi

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DIE GRINDINGMAUHINB. No. 326,001. Patented Sept. 8,-1885.

WITNESSES Wm Azforney 1 N4 PETERS. PlmloLllhngaphen Withingtun. D. C.

PATENT OFFICE.

ELISHA s. WHITE, on CLEVELAND,

OHIO, Assieivon or ONE-HALF TO GEORGE O. 'JUL I EIt, OF SAME PLACE.

DIE-GRINDING MACHINE.

l SPECIFICATION forming part of Letters Fatent No. 326,001, dated September 8, 1885.

' Application filed June13, 1884. (No model.)

To all whom it may concern}.- I

Be' it known that I, ELIsHA S. WHITE, a citizen of the United States, residing at Cleveland, county of .Ouyahoga, and Stateof Ohio, have invented certain new and useful Improvements in Die-GrindingMachines; and I do hereby declare .the following to be a description of the same, and of the manner of con- 1 structing and using the invention, in such full, clear, concise, and exact terms .as to enable any person skilled in the art to which it appertains to construct and use the same, reference being had to the accompanying drawings,,forming a part of the specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates more particularly to grinding-machines adapted to grind or dress any variety of thread-dies, such as are used in bolt-cutters. The controlling object thereof is to provide a construction adapted to present any one jaw of a die to the grinding or dressing tool at any desired pitch of angle. To thisend the die-holder is adapted to" have a universal-joint movement by means of a number of independent adjusting devices, said adjusting devices being hereinafter described in full, and specifically stated in. the claims.- Figure 1 is a side elevation of the machine. Fig. 2 is a rear elevation. Fig.3 is a vertical longitudinal section in a plane passing centrally through the die-holder. Fig. 4 is a vertical transverse sectionin a plane passing centrally through the vertically-slotted standard, Fig. 5 is a detail .view in rear elevation of the disk in rear of the eccentric disk. "Fig.6 is a detail view in rear elevation of the eccentric disk and the die-holder. Fig, 7 is a detail showing a front elevation 'of the die-holder and a die. in position thereon. Fig. 8 is a 1 view similar to the preceding, but representing the parts in position as the die-holder is eccentrically adjusted."

The bed-plate A is provided with a short longitudinal slot, at, in which fits a lug, 12, depending from the bottom of the spindle-hold- ,er B. This lug b maintains thespindle-holder in a right line, while permitting its free longi- 0,.clamps said spindle-holder in proper potudinally adjusted to the required point.

The slotted standard D is provided at its bottom with a depending dovetailed slide, 0, working in a corresponding transverse groove, d, formed in the bedplate.

'A horizontal screw, E, is fitted in a transverse groove, 6, formed in the bed-plate, and is threaded through projection f, depending from the slide 0. By means of this adjustment the die-holder is moved in a transverse right line across the bed-plate.

The standard D is provided with a vertical dovetailed slideway, g, in which fits a corresponding slide, h, said slide being provided with the lateral projection Z, through which screw has its lower end secured to a step, m, rigid with the standard, thereby preventing said screw from vertical movement, while permitting its rotary movement. By means ofthis adjustment the said slide his adapted to be adj usted and maintained at any desired elevation.

face-bearing for a counterpart rotary disk, 10, having a horizontal pivot,r, extending through from the latter. This projecting extremity is clamping-screw s. .This latter screw fitsloosely in vertical slot t of the standard, and has free movement therein, as the slide his vertically adjusted on said standard. 7 The purpose of said clamp-screw s is to maintain ro- 12, said rotary adjustment of disk p operating to the die-holder. Disk 0 has a horizontal arm, G, provided 'on its upper face with a disk, H, said disk and arm being respectively provided with a central vertical hole, a, in which fits a pivot, b, depending from disk K, counterpart in form to said disk H. The outer end of said arm G is slitted in vertical line with a corresponding lugs, cl, rigid with and depending from said sition on the bed*plate after it has been longisaid disk 12 and slide h, and projecting out.

is threadeda vertical set-screw, F. This set- Slide It has a rigid disk, n, adapted to provide screw threaded for the attachment thereto of l tary disk 1) at any desired adjustment on disk to give a rotary adj ustment in a vertical plane slit indisk H, said slit forming a continuous passage, 0, with the space formed between two disk H. A horizontal clamp-screw, L, passes through said two lugs and serves to clamp pivot b in hole a, so as to maintain disk K at any desired point of rotary adjustment in a horizontal plane. Disk K is provided with a standard, M, having a longitudinally slotted sleeve, N, in which fits the horizontal spindle P. This sleeve N is provided with ears 6, through which is threaded set-screwf, thereby adapting spindle P to be clamped in the sleeve at any desired point of rotary adj ustment. This spindle is operated by a handwheel, R, located thereon at its rear extremity, while its opposite extremity is rigid with a disk, S.

\Vorking against the face of disk S is a disk, T, which I will term the eccentric disk. This eccentric disk is pivoted to disk S atone point near its periphery by pivot g, which permits said eccentric disk to have rotary movement in a vertical plane on said pivot as its center of movement.

Disk S is provided near its periphery in a line opposite from pivot g with acurved slot, h, in which latter works a set-screw, Z, connected to the eccentric disk.

The die-holder V has a central horizontal pivot, m, projecting from its inner face and fitting in a corresponding socket, a, formed in the eccentric disk. Two clamps, p, bind the die-holder to the eccentric disk so as to maintain said die-holder at any desired point of rotary adjustment thereon. The slots 8 in the die-holder are adapted to receive thebolts for holding the die in grinding position. The object of this eccentric device is to provide means for obtaining a proper clearance or backing off of the die in grinding any onejaw of the latter. By throwing this eccentric disk in an outward rotary movement it results in adjusting the die-holder so that each jaw of the die may have the proper amount of clearance as the die is revolved in the operation of grinding. The set-screws g and Z serve to clamp the eccentric disk rigid to the spindledisk S. This eccentric disk can be set for each die, so that in grinding the latter all the jaws thereof can have an exact and equal amount of clearance or backing off simply by adjusting the die-holder in its rotary movement prior to grinding each jaw, this rotary adjustment of the die-holder being effected by its. movement on pivot m, and the clamps p serving to hold said die-holder in such desired position.

It is thus apparent that in my machine there are a number of prominent adjustments. The transverse rectilinear adjustment of the standard in a horizontal line serves to bring the die-holder into the proper line with the grinding-tool, while the vertical rectilinear adj ustment of parts operated by screw F serves to bring the die-holder to the proper elevation for the grinding-tool. This latter adjustment results in causing the face of each jaw to be ground straight. The set-screw f operates to clamp the spindle P in its sleeve-bearing, so as to maintain the die-holder in fixed position, thereby causing the die to be held stationary while its jaws are being faced. The horizontal rotary adjustment of parts effected by disk K serves to present the die to the grinding-tool at such an angle-as to give a correct curve for the jaws. A further and additional result of this last-described movement is to give an oblique adjustment for spiral dies. The vertical rotary adjustment of parts effected by disk 1; serves to present the die to the grinding-tool at such an angle as to impart any desired bevel or lead to the cutting'edges of each jaw.

It is apparent that I obtain valuable results in the easy and accurate grinding of dies.

The grinding-tool W may be of any desired character, as may also be its spindle W.

Other forms of embodying and using the principle of my invention may be employed in substitution for the specific form herein shown. It will therefore be understood that omissions, substitutions, and changes may be made as regards the forms and parts herein set forth, provided the principles of construction embraced in the following claims are retained and employed.

I therefore particularly point out and distinctly claim as my invention- 1. The combination, with disk K, having depending pivot b, of disk H, having hole a, the wall of the latter having slit and set screw L, clamping the walls of said slittogether, substantially as set forth.

2. The combination, with disk K, having depending pivot b, of disk H, having hole a, provided with slit 0, 'lugs (Z, respectively depending from said disk on either side of said slit, and set-screw L, clamping said lugs together, substantially as set forth.

3. The combination, with a die-holder, V, and spindle P,of intermediate adj usting mechanism which maintains said die-holder at different points of adjustment in a rotary movement eccentric to said spindle, substantially asset forth.

4. The combination, with a die-holder, V, r

and a spindle, P, of a disk, S, secured to the latter, and adjusting mechanism which maintains said die-holder at different points of adjustment on said disk in a vertical rotary movement eccentric to said spindle, substantially as set forth.

5. The combination, with spindle P and disk S, secured to latter and provided with slot h, of disk T, pivoted at g to disk S, screw Z, and die holder V, substantially as set forth. 6. The combination, with die-holder V, spindle P, and disk S, rigid with latter, of disk T, located between the dieholder and disk S, said die-holder being pivoted to disk T, and clamps which secure the two latter parts together at the desired point of rotary adjustment, substantially as set forth.

7. The combination, with spindle P and disk S, of disk '1 and adjnstingmeans which maintain, said disk T at a desired point of adjustment on said disk S in a vertical r0 tary movement eccentric to said spindle, said 5 die-holder being pivoted on disk T, and provided with clamps p, for maintaining it indesired position, substantially as set forth.

be my invention I have hereunto se this 10th day of J nne, A. D. 1884.-

Witnesses:

J. B. FAY, THOS. B. HALL.

In testimonythat I claim the foregoing to t my hand ELISHA S. WHITE. 

